CN101781878B - Integral lifting template of main pylon of single-pylon cable-stayed bridge without dorsal cables and lifting construction method thereof - Google Patents
Integral lifting template of main pylon of single-pylon cable-stayed bridge without dorsal cables and lifting construction method thereof Download PDFInfo
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Abstract
The invention discloses an integral lifting template of a main pylon of a single-pylon cable-stayed bridge without dorsal cables and a lifting construction method thereof. The method comprises the following steps of: (1) preparation before construction; (2) lower bridge structure construction; (3) upper bridge structure construction comprising the following construction processes of: lower pylon concrete pouring construction, lower beam construction, middle pylon segmental pouring construction, alternate segmental pouring construction of an upper pylon and a middle suspension cable beam segment and stayed-cable mounting, wherein an integral lifting template is used for segmental construction on both the middle pylon and the upper pylon; and (4) bridge surface system construction. The integral lifting template has reasonable structural design, convenient processing, manufacture, mounting and arrangement, low investment cost, simple construction method and steps and high construction speed and can quickly and safely complete the construction task of the main pylon of the cable-stayed bridge by utilizing simple construction tools and investing less labor, and various technical indexes of the main pylon of the constructed and molded cable-stayed bridge meet the requirements of the design and a construction specification.
Description
Technical field
The invention belongs to the bridge main tower technical field of construction, especially relate to a kind of main pylon of single-pylon cable-stayed bridge without dorsal integral hoisting template and promote job practices.
Background technology
The Baoji is positioned at the east, urban district, Baoji, Shaanxi province in China first ancestor, Yan Di, also known as Shen Nong, a legendary ruler hometown for the Weihe River, tame gulf bridge; Belong to one of Baoji " four horizontal ten is vertical " turnpike road screen frame frame; Its landmark building that to be a function merge with view mutually, the bridge construction complex process, with high content of technology.
The Baoji is for long 1146 meters of the Weihe River, tame gulf bridge full-bridge bridge; Stride the footpath combination: meter (cable stayed bridge)+16 * 32,10 * 20 meters (hollow slab beam)+127 meter (macropore plate-girder)+127 meters (cable stayed bridge)+9 * 20 meter (hollow slab beam); Main bridge is that only tower does not have the dorsal funciculus slant-pull structure; It is identical that full-bridge has two and two cable stayed bridge structures, crosses over the Bin He road in western precious speedway and the planning respectively.127 meters of cable stayed bridge total lengths are specifically striden the footpath and are arranged as 32+75+20 rice, long 63 meters of the king-tower more than the bridge floor, and the king-tower length below the bridge floor is 10.425 meters, and is reinforced concrete structure; 28 meters of girder employing prestressed reinforced concrete box-beam structure and deck-sidings, full-bridge is provided with the suspension cable of 9 fan-shaped distributions.
Particularly: the bored pile of 1.5 meters of 38 diameters, the friction pile that stake is long 51.36 meters are adopted in cable stayed bridge king-tower basis; Connect 18.2 meters of 33.28 meters of length, the width of king-tower cushion cap on the bored pile and highly be 4 meters, profile is inferior bell type, and concrete design side amount is 2118.8 cubic metres.
Girder is that stiff girder is oblique web list case four Room prestress concrete box girders, concrete label C50.Wherein, girder deck-molding 2.15m, deck-molding fades to 3.15m at the tower beam consolidation place, the wide 28m of case back, bottom width 19.6m, every side is chosen arm 3.65m, the thick 250mm of top board, the thick 200mm of base plate, the vertical wide 400mm of web, the oblique wide 450mm of web, the wide 750mm of middle pectoral plate.
King-tower is that Sarasota adopts diamond, comprises upper king-post strut, middle king-post, lower king-post strut and lower transverse beam, adopts the C50 concrete.Bridge tower is 60 ° along bridge to the angle of inclination, and direction across bridge face leaning angle is 23.415 °.The above king-tower of bridge floor is long 63 meters of leaning tower (being upper king-post strut and middle king-post total length), wherein anchor-hold district (being upper king-post strut) about 30.3 meters; The following battered leg of bridge floor (be lower king-post strut vertically to height) is long 10.425 meters.Leaning tower epimere cat head anchorage zone is a rectangular cross section, is 5 meters along bridge to width, and the direction across bridge width is 6 meters, and the anchor-hold district opens 1.2 meters wide notches; The direction across bridge wide of the bifurcated of leaning tower hypomere (king-post promptly) is 3.5 meters, along the rectangular solid section of bridge to 5 meters; Tower beam consolidation place (being king-tower and girder junction) sets crossbeam, and is high 3.15 meters, and suitable bridge is to wide 5.774 meters; The following bridge leg of bridge floor is that the battered leg section is wide to the equal gradual change of both direction, broadens to 10 meters to 5.774 meters along bridge, and direction across bridge broadens to 8 meters for 3.814 meters.
The suspension cable of being installed on the leaning tower is single rope face, and beam-ends is arranged on the median strip.
The king-tower complex structure, technological requirement is high, and difficulty of construction is big.Long 63 meters of leaning tower more than the king-tower bridge floor; In king-post be the inclined in two-way structure and do not have prestressing force that stress is very complicated in the work progress, careless slightlyly possibly produce stressed crack; The inclined in two-way of king-tower is brought very big difficulty to Template Location in the work progress simultaneously; Main pylon of single-pylon cable-stayed bridge without dorsal construction control difficulty is very big, specifically is how location survey, coordinate Calculation of inclined in two-way leaning tower, and how leaning tower is linear accurately controls.
Summary of the invention
Technical problem to be solved by this invention is to above-mentioned deficiency of the prior art, a kind of reasonable in design, processing and fabricating is provided and the main pylon of single-pylon cable-stayed bridge without dorsal integral hoisting template that laying is convenient and cost of investment is low, speed of application is fast is installed.
For solving the problems of the technologies described above; The technical scheme that the present invention adopts is: a kind of main pylon of single-pylon cable-stayed bridge without dorsal integral hoisting template; It is characterized in that: comprise be used for segmentation build the formwork-strengthening system of the required construction cable stayed bridge of moulding king-tower, along match with the whole Hoisting System that upwards promotes of said formwork-strengthening system, with the formwork-strengthening system demoulding matched moulds system that uses and be separately positioned on the formwork-strengthening system top and bottom and the plateform system that supplies the constructor to walk of direction that extends upward of required construction cable stayed bridge king-tower, said Hoisting System is installed on the said formwork-strengthening system; Said formwork-strengthening system comprises the forming mould plate, be laid in the forming panel framework in the outside around the said forming mould plate and temporary fixed tie system is carried out in the position of said forming panel framework; Said forming panel framework is made up of a plurality of coupling assemblings that are assembled into one through the connection securing member; Said demoulding matched moulds system comprises the interim connector that is installed on the forming panel framework, jack and/or the Chain block on the said forming mould plate is installed when being installed in interim limiting and fixing device and the demoulding or the matched moulds on the said forming mould plate.
Said forming mould plate is formed by surrounding the four formation of lots panels all around that are tilted to the concreting chamber, and the said structure that is tilted to the concreting chamber is corresponding with the structure that needs moulding cable stayed bridge king-tower.
Said forming panel framework by pattern plate bolster be laid in around the said pattern plate bolster side and said pattern plate bolster carried out fastening multiple tracks level form to the quadrilateral structure framework; Said pattern plate bolster is surrounded by four sides template frame and said template frame comprise about two horizontal truss and with about two a plurality of template stiffening ribs that horizontal truss connects as one; Said level is connected to form by four falsework head and the tail to the quadrilateral structure framework successively, and said connection securing member is the pretension bolt that is connected between adjacent two falseworks head and the tail.
Said tie system comprises a plurality of said forming panel framework draw rod device of side all around that are laid in respectively, and the lower end of said draw rod device is installed on the said forming panel framework.
The upper and lower end parts of said forming mould plate is provided with the fixed section template that extend outwards section and said extend outwards section are formed said forming mould plate.
Said four falseworks comprise two along bridges to the falsework one and two direction across bridge layings and the identical falsework two of structure laid and structure is identical, the one or more girth members that hold out against of having jumped the queue of the junction between falsework one and the falsework two.
Said formwork-strengthening system is processed by steel material.
Simultaneously; The present invention also provides the main pylon of single-pylon cable-stayed bridge without dorsal that a kind of method step is easy, the construction period is short and construction quality is good, practical value is high construction method for lifting whole; The cable stayed bridge king-tower of being constructed is divided into from the bottom to top that a plurality of sections are constructed and said cable stayed bridge king-tower set inside has and the corresponding whole stiff skeleton of its structure, it is characterized in that this method may further comprise the steps:
(a) bottom segment casting and constructing: at first formwork-strengthening system is fixedly mounted on the outside around the bottom of whole stiff skeleton; After more said forming mould Board position being transferred to design attitude; Screw said connection securing member and make whole forming panel framework closely contact with the forming mould plate is promptly accomplished the matched moulds process of said formwork-strengthening system; Subsequently, utilize the formwork-strengthening system of installation in position, utilize the bottom segment of the said cable stayed bridge king-tower of said formwork-strengthening system pouring construction behind the matched moulds;
(b) install the end slideway: build in next that is used for that moulding built the moulding sections on the stiff skeleton lateral surface of sections and lay multiple tracks upper end slideway, and make upper surface and the moulding of said upper end slideway said next build the stiff skeleton lateral surface flush of sections;
(c) demoulding: all that laid on the said forming panel framework of at first outwarding winding connect securing member; And adopt interim connector to replace said connection securing member that said forming panel framework is assembled into one simultaneously, make the shape of forming panel framework remain unchanged and only its inner frame size become big from top to bottom in proportion; Adopt jack and/or Chain block to open said forming mould plate afterwards, forming panel framework and forming mould plate after adopting interim limiting and fixing device to open simultaneously are assembled into one, and promptly accomplish the knockout course of said formwork-strengthening system;
(d) promote: Hoisting System is installed in the step (c) on the forming panel framework after the demoulding; And the direction that extends upward along required construction leaning tower upwards is promoted to said formwork-strengthening system integral body and is used for moulding described in the step (b) next builds the stiff skeleton outside of sections; And when promoting, the concrete surface that the upper end of said formwork-strengthening system utilizes the upper end slideway of being installed in the step (b) upwards to promote and the bottom of said formwork-strengthening system utilizes its underpart to build completion promotes;
(e) matched moulds: after treating that said formwork-strengthening system lifting puts in place; At first unclamp said interim limiting and fixing device and interim connector; After adopting jack and/or Chain block to strain said forming mould plate afterwards and the position of said forming mould plate being transferred to design attitude; Screw said connection securing member and make whole forming panel framework closely contact with the forming mould plate is promptly accomplished the matched moulds process of said formwork-strengthening system;
(f) concrete pouring construction: utilize next described in the said formwork-strengthening system pouring construction step (b) behind step (e) matched moulds to build sections;
(e) repeating step (b)～(f) is accomplished all sections of said cable stayed bridge king-tower until pouring construction.
The left part direction across bridge of institute's construction cable stayed bridge king-tower slope inwardly and said forming mould plate to surround the shape of cross section that is tilted to the concreting chamber be parallelogram, and the four formation of lots panels of forming said forming mould plate with the longitudinal center line of the said cable stayed bridge king-tower of need moulding be divided into that left side and two of upsides lie prone downwards on lie prone two on face moulding panel and downside and right side to the following moulding panel of facing upward of facing upward;
In the knockout course described in the above-mentioned steps (d); Adopting jack and/or Chain block to open said two steps of forming mould plate time-division carries out: at first open face upward under two the moulding panel and adopt interim limiting and fixing device to open after the forming panel framework with under the moulding panel of facing upward be assembled into one, open again afterwards lie prone on two face moulding panel and adopt interim limiting and fixing device to open after the forming panel framework and on the face moulding panel of lying prone be assembled into one.
Hoisting System described in the step (d) comprises that an end when promoting is fixed on a plurality of elevators on the said forming panel framework, is installed in a plurality of pulley brackets of the inboard upper and lower end parts of forming panel framework and is installed in a plurality of pulleys on the said pulley bracket through pulley spindle;
In the knockout course described in the step (c); After adopting jack and/or Chain block to open said forming mould plate; Earlier in the upper and lower end parts of said forming panel framework pulley is installed respectively, forming panel framework and forming mould plate after adopting interim limiting and fixing device to open again are assembled into one; Correspondingly; In the matched moulds process described in the step (e); After treating that said formwork-strengthening system lifting puts in place, at first unclamp said interim limiting and fixing device, adopt jack and/or Chain block to open said forming mould plate again; Take out the pulley of being installed in the step (c) and then, unclamp said interim connector subsequently again; After adopting jack and/or Chain block to strain said forming mould plate afterwards and the position of said forming mould plate being transferred to design attitude; Screw said connection securing member and make whole forming panel framework closely contact with the forming mould plate is promptly accomplished the matched moulds process of said formwork-strengthening system.
The present invention compared with prior art has the following advantages:
1, reasonable in design, processing and fabricating and installation laying are conveniently and cost of investment is low, speed of application is fast.
2, construction sequence is reasonable in design and construction safety is reliable, and construction precision is high, and the cable stayed bridge king-tower structure of construction molding is firm, and construction effect is good and quality is high, short construction period.
3, hardware investment is few and construction sequence is easy and simple to handle, and operability is very strong.
4, adopt stage by stage the pouring construction mode to construct; When shortening the construction period, guaranteeing construction quality and guaranteeing the construction control precision; Also can rationally arrange the constructor to carry out rational allocation, and guarantee safe and reliable the carrying out of construction largely.
6, practical value is high, has avoided the construction period of over-form construction method long, and the template difficulty is in place, the shortcoming that safety is difficult to guarantee; Simultaneously, avoided the climbing formwork for construction complex process, the shortcoming that cost is high.The construction of integral hoisting template system utilizes simple construction tool, the manual work that less input, and the construction task of completion king-tower fast and safely, king-tower each item technical indicator satisfies the design and construction code requirement.
In sum; The used integral hoisting template reasonable in design of the present invention, processing and fabricating and installation are laid conveniently, cost of investment is low and construction method step is simple, speed of application is fast; Utilize simple construction tool; The manual work that less input can fast and safely accomplish the construction task of cable stayed bridge king-tower, and cable stayed bridge king-tower each item technical indicator of institute's construction molding is satisfied the design and construction code requirement.
Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.
Description of drawings
Fig. 1 is the operating principle block diagram of integral hoisting template of the present invention.
Fig. 2 by the present invention the perspective view of construction non-cable single-tower stayed bridge.
Fig. 3 by the present invention the perspective view of construction main pylon of single-pylon cable-stayed bridge without dorsal.
Fig. 4 is the left view of Fig. 3.
Fig. 5 is the vertical view of Fig. 3.
Fig. 6 is the structural representation of the template used hardened system of king-post in the present invention's construction.
Fig. 7 is the internal construction sketch map of Fig. 6.
The construct structural representation of the template used hardened system of upper king-post strut of Fig. 8 the present invention.
Fig. 9 is the construct structural representation of the used whole stiff skeleton of leaning tower of the present invention.
Figure 10 is the construct method flow diagram of main pylon of single-pylon cable-stayed bridge without dorsal of the present invention.
Figure 11 utilizes the middle king-post of integral hoisting template construction cable stayed bridge king-tower and the method flow diagram of upper king-post strut for the present invention.
Description of reference numerals:
The 1-girder; 2-transition bridge pier; 3-king-tower basis;
4-king-tower cushion cap; The 5-1-lower king-post strut; King-post among the 5-2-;
The 5-3-upper king-post strut; 6-supports bridge pier; The 7-lower transverse beam;
The whole stiff skeleton of 8-; 10-moulding panel; 11-1-forming mould plate one;
11-2-forming mould plate two; The forming surface of facing upward under the last face forming surface 12-2-that lies prone of 12-1-
Plate; Plate;
13-1-falsework one; 13-2-falsework two; The 15-suspension cable;
16-fixed section template; The horizontal truss of 17-1-; 17-2-template stiffening rib;
The 18-1-formwork-strengthening system; The 18-2-Hoisting System; 18-3-demoulding matched moulds system;
The 18-4-plateform system.
The specific embodiment
Like Fig. 1, Fig. 6, Fig. 7 and a kind of main pylon of single-pylon cable-stayed bridge without dorsal integral hoisting template shown in Figure 8; Comprise be used for segmentation build the formwork-strengthening system 18-1 of the required construction cable stayed bridge of moulding king-tower, along required construction cable stayed bridge king-tower extend upward match with the whole Hoisting System 18-2 that upwards promotes of said formwork-strengthening system 18-1, with the formwork-strengthening system 18-1 demoulding matched moulds 18-3 of system that uses and be separately positioned on formwork-strengthening system 18-1 top and bottom and the plateform system 18-4 that supplies the constructor to walk of direction, said Hoisting System 18-2 is installed on the said formwork-strengthening system 18-1.Said formwork-strengthening system 18-1 comprises the forming mould plate, be laid in the forming panel framework in the outside around the said forming mould plate and temporary fixed tie system is carried out in the position of said forming panel framework; Said forming panel framework is made up of a plurality of coupling assemblings that are assembled into one through the connection securing member; The said demoulding matched moulds 18-3 of system comprises the interim connector that is installed on the forming panel framework, jack and/or the Chain block on the said forming mould plate is installed when being installed in interim limiting and fixing device and the demoulding or the matched moulds on the said forming mould plate.
In the present embodiment, said forming mould plate is formed by surrounding the four formation of lots panels 10 all around that are tilted to the concreting chamber, and the said structure that is tilted to the concreting chamber is corresponding with the structure that needs moulding cable stayed bridge king-tower.Said forming panel framework by pattern plate bolster be laid in around the said pattern plate bolster side and said pattern plate bolster carried out fastening multiple tracks level form to the quadrilateral structure framework; Said pattern plate bolster is surrounded by four sides template frame and said template frame comprise about two horizontal truss 17-1 and with about two a plurality of template stiffening rib 17-2 that horizontal truss 17-1 connects as one; Said level is connected to form by four falsework head and the tail to the quadrilateral structure framework successively, and said connection securing member is the pretension bolt that is connected between adjacent two falseworks head and the tail.Said formwork-strengthening system 18-1 processes by steel material.
Said tie system comprises a plurality of said forming panel framework draw rod device of side all around that are laid in respectively, and the lower end of said draw rod device is installed on the said forming panel framework.The upper and lower end parts of said forming mould plate is provided with the fixed section template 16 that extend outwards section and said extend outwards section are formed said forming mould plate.Said four falseworks comprise that two are laid and identical falsework two 13-2 of structure to falsework one 13-1 and two direction across bridge of laying and structure is identical along bridges, the one or more girth members that hold out against of having jumped the queue of the junction between falsework one 13-1 and falsework two 13-2.Said formwork-strengthening system 18-1 processes by steel material.
In conjunction with Fig. 2, Fig. 3, Fig. 4 and Fig. 5; In the present embodiment; The main pylon of single-pylon cable-stayed bridge without dorsal of being constructed is made up of lower king-post strut 5-1, middle king-post 5-2 and upper king-post strut 5-3 from bottom to up; Girder 1 two ends respectively across about on two transition bridge piers 2; Wherein middle king-post 5-2 and upper king-post strut 5-3 form the bridge floor that is positioned at girder 1 above and along bridge to the leaning tower that is tilted to the right, said leaning tower pouring construction is that one and integral body are down " Y " font structure, middle king-post 5-2 be laid in upper king-post strut 5-3 bottom about two bifurcated sections and the laying of said two bifurcated section direction across bridge symmetry.In the present embodiment, 127 meters of the cable stayed bridge total lengths of being constructed are specifically striden the footpath and are arranged as 32+75+20 rice, long 63 meters of the king-tower more than the bridge floor, and the king-tower length below the bridge floor is 10.425 meters, and is reinforced concrete structure; 28 meters of girder employing prestressed reinforced concrete box-beam structure and deck-sidings, full-bridge is provided with the suspension cable of 9 fan-shaped distributions.And king-tower adopts diamond, comprises lower king-post strut 5-1, middle king-post 5-2, upper king-post strut 5-3 and lower transverse beam 7, and bridge tower is 60 ° along bridge to the angle of inclination, and direction across bridge face leaning angle is 23.415 °.Long 63 meters of the above leaning tower of bridge floor, wherein the anchorage zone is about 30.3 meters, long 10.425 meters of the following battered leg of bridge floor.Leaning tower epimere cat head anchorage zone is that upper king-post strut 5-3 is a rectangular cross section, is 5 meters along bridge to width, and transverse width is 6 meters, and the anchor-hold district opens 1.2 meters wide notches; The promptly middle king-post 5-2 of the bifurcated of leaning tower hypomere is wide 3.5 meters; Along the rectangular solid section of bridge to 5 meters, the tower beam consolidation place establishes crossbeam, and is high 3.15 meters; Suitable bridge is to wide 5.774 meters; The following bridge leg of bridge floor is that lower king-post strut 5-1 section is wide to the equal gradual change of both direction, broadens to 10 meters to 5.774 meters along bridge, broadens to 8 meters to 3.814 meters along bridge.According to the Sarasota design feature, upper king-post strut in the Sarasota is divided into three parts constructions, first is middle king-post 5-2 construction, is divided into 9 sections constructions according to the design feature of middle king-post 5-2; Second portion is the infall construction of middle king-post 5-2 and upper king-post strut 5-3, is divided into 1 sections pouring construction according to its structural requirement; Third part has the construction of rope section for upper king-post strut 5-3, is divided into the construction of 11 sections according to its design feature.
During practice of construction; At first according to the leaning tower structure of design non-cable single-tower stayed bridge; Utilize the steel fastener segmented assembly to form to be used for the whole stiff skeleton 8 (structure sees Fig. 9 for details) of the said leaning tower of construction molding, said whole stiff skeleton 8 is made up of a plurality of stiff skeleton section assemblings from bottom to up and global shape is " Y " font.Subsequently; Carry out the bridge substructure construction: at first; According to bridge substructure that designs non-cable single-tower stayed bridge in advance and concrete installation position thereof; The king-tower basis 3 that construction is used to the pressure transmission power under the bridge superstructure of carrying between two transition bridge piers 2 about said with support bridge pier 6, and king-tower cushion cap 4 that will machine-shaping in advance transfers and is installed in and construct on the king-tower basis 3 of accomplishing, king-tower basis 3 is positioned at support bridge pier 6 left sides; Said king-tower basis 3, king-tower cushion cap 4, support bridge pier 6 and about two transition bridge piers 2 form the bridge substructure of non-cable single-tower stayed bridges; Girder 1 is that the boundary hangs Suo Liang section 1-2 and three bridge sections of right side end bay beam section 1-3 along bridge end bay beam section 1-1, middle part on the left of being divided into to support bridge pier 6 with king-tower basis 3.
In the present embodiment, the bored pile of 1.5 meters of 38 diameters is adopted on said king-tower basis 3, and stake is long 51.36 meters; And connect 33.28 meters of the length of king-tower cushion cap 4 on the king-tower basis 3,18.2 meters of width highly are 4 meters, and profile is inferior bell type, and measure concrete design side is 2118.8 cubic metres.
In conjunction with Figure 10, after said bridge substructure construction finishes, carry out the integral construction of cable stayed bridge king-tower again, its work progress is following:
301, lower king-post strut 5-1 concrete pouring construction: the lower king-post strut 5-1 that is constructed is that direction across bridge is laid in two symmetrical supporting bridge legs on the king-tower cushion cap 4.
302, lower transverse beam 7 construction: the direction across bridge lower transverse beam 7 of constructing between two supporting bridge legs, lower transverse beam 7 two ends of being constructed respectively across said two supporting bridge leg tops and lower transverse beam 7 be connected to one with said two supporting bridge legs.
303, girder 1 and leaning tower construction, its work progress may further comprise the steps:
3031, left side end bay beam section 1-1 and right side end bay beam section 1-3 construction: left side transition bridge pier 2 with support between the bridge pier 6 and 2 on king-tower basis 3 and right side transition bridge pier construction left side end bay beam section 1-1 and right side end bay beam section 1-3 respectively, and lower transverse beam 7 and right side end bay beam section 1-3 are joined the two sections of a bridge, etc.
3032, the middle part hangs Suo Liang section 1-2 and leaning tower construction, and adopts that the forming panel segmentation is whole to be promoted and the job practices of segmentation concreting is carried out section construction during the leaning tower construction, and its work progress is following:
(i) in the assembly unit of king-post stiff skeleton: a plurality of stiff skeleton sections that are used for moulding king-post (5-2) that are assemblied to form in the step 1 are assembled into king-post stiff skeleton in the inverted v-shaped, said in the king-post stiff skeleton by the upper end fit together about two stiff skeleton bifurcated sections form;
(ii) middle king-post stiff skeleton is installed: adopt lifting device that the middle king-post stiff skeleton that is assemblied to form in the step (i) is lifted and is transferred on the lower transverse beam 7, and king-post stiff skeleton bottom in said is fixedly mounted on the lower transverse beam 7; Simultaneously; Adopt lifting device will be used for supporting the steel pipe bracing frame lifting of said king-post stiff skeleton and being transferred to right side transition bridge pier 2; Afterwards the bottom of steel pipe bracing frame is fixed on the right side transition bridge pier 2 and with the steel pipe bracing frame topple over and make its top be fixed on said in the top crotch of king-post stiff skeleton, promptly said middle king-post stiff skeleton is supported on preset angle of inclination through the steel pipe bracing frame that is tilted to;
(iii) middle king-post 5-2 segmentation pouring construction: piecemeal forming panel is fixedly mounted on the said middle king-post stiff skeleton outside and the corresponding concrete pouring construction that carries out piecemeal, king-post 5-2 in the construction completion is whole;
(iv) upper king-post strut 5-3 and middle part hang hocket segmentation pouring construction and suspension cable 15 of Suo Liang section 1-2 and install; The corresponding sections and corresponding the repetition several times that is divided into equivalent amount with middle part extension Suo Liang section 1-2 of upper king-post strut 5-3 of accomplishing of will constructing before the construction constructed; Wherein each section construction process is: earlier at the middle king-post 5-2 tower end of completion or the upper king-post strut sections of tower end concrete pouring construction of upper king-post strut sections of constructing; Corresponding more afterwards at the left side of lower transverse beam 7 beam-ends or middle part of beam-ends concrete pouring construction of hanging the rope girder segment, the middle part of accomplishing of having constructed hang the rope girder segment, upper king-post strut sections of accomplishing in this construction subsequently and middle part hang to hang between the rope girder segment and skew drag-line 15; Constantly repeat above-mentioned section construction process, hang Suo Liang section 1-2 and left side end bay beam section 1-1 closure, remove forming panel at last and remove the steel pipe bracing frame, promptly accomplish the work progress of girder 1 and leaning tower until upper king-post strut 5-3 construction completion and with the middle part.
Shown in figure 11, step (iii) in centering king-post 5-2 carry out segmentation pouring construction and step when upper king-post strut 5-3 being carried out the segmentation pouring construction in (iv), all adopt integral hoisting template to carry out pouring construction, and its pouring construction process includes following steps:
(a) bottom segment casting and constructing: at first formwork-strengthening system 18-1 is fixedly mounted on the outside around the stiff skeleton bottom that is used for moulding king-post 5-2 or upper king-post strut 5-3; After more said forming mould Board position being transferred to design attitude; Screw said connection securing member and make whole forming panel framework closely contact with the forming mould plate is promptly accomplished the matched moulds process of said formwork-strengthening system 18-1; Subsequently, utilize the bottom segment of king-post 5-2 in the formwork-strengthening system 18-1 pouring construction behind the matched moulds or upper king-post strut 5-3;
(b) install the end slideway: build in next that is used for that moulding built the moulding sections on the stiff skeleton lateral surface of sections and lay multiple tracks upper end slideway, and make upper surface and the moulding of said upper end slideway said next build the stiff skeleton lateral surface flush of sections;
(c) demoulding: all that laid on the said forming panel framework of at first outwarding winding connect securing member; And adopt interim connector to replace said connection securing member that said forming panel framework is assembled into one simultaneously, make the shape of forming panel framework remain unchanged and only its inner frame size become big from top to bottom in proportion; Adopt jack and/or Chain block to open said forming mould plate afterwards, forming panel framework and forming mould plate after adopting interim limiting and fixing device to open simultaneously are assembled into one, and promptly accomplish the knockout course of said formwork-strengthening system 18-1;
(d) promote: said Hoisting System 18-2 is installed in the step (c) the forming panel framework after the demoulding along the direction that extends upward of required construction leaning tower; Said formwork-strengthening system 18-1 integral body upwards is promoted to is used for moulding described in the step (b) next builds the stiff skeleton outside of sections; And when promoting, the concrete surface that the upper end of said formwork-strengthening system 18-1 utilizes the upper end slideway of being installed in the step (b) upwards to promote and the bottom of said formwork-strengthening system 18-1 utilizes its underpart to build completion promotes;
(e) matched moulds: after treating that said formwork-strengthening system 18-1 lifting puts in place; At first unclamp said interim limiting and fixing device and interim connector; After adopting jack and/or Chain block to strain said forming mould plate afterwards and the position of said forming mould plate being transferred to design attitude; Screw said connection securing member and make whole forming panel framework closely contact with the forming mould plate is promptly accomplished the matched moulds process of said formwork-strengthening system 18-1;
(f) concrete pouring construction: utilize next described in the said formwork-strengthening system 18-1 pouring construction step (b) behind step (e) matched moulds to build sections;
(e) repeating step (b)～(f), king-post 5-2 or upper king-post strut 5-3 in pouring construction is accomplished.
In the present embodiment, the lower end of said draw rod device is installed on the said forming panel framework and its upper end is fixed on the said whole stiff skeleton 8.
Said forming mould plate comprises forming mould plate one 11-1 that is used for moulding king-post 5-2 and forming mould plate two 11-2 that are used for moulding upper king-post strut 5-3, and the forming mould plate that is used for moulding king-post 5-2 and upper king-post strut 5-3 all is set to whole punching block.Because the left part direction across bridge symmetry of said two bifurcated sections slopes inwardly; It is parallelogram that said forming mould plate one 11-1 surrounds the shape of cross section that is tilted to the concreting chamber, and said forming mould plate two 11-2 to surround the shape of cross section that is tilted to the concreting chamber be square.The four formation of lots panels 10 of forming forming mould plate one 11-1 with the longitudinal center line of king-post 5-2 in the need moulding be divided into that left side and two of upsides lie prone downwards on lie prone two on face moulding panel 12-1 and downside and right side to the following moulding panel 12-2 that faces upward that faces upward.Correspondingly; In the knockout course described in the step (d); Adopting jack and/or Chain block to open said two steps of one 11-1 time-division of forming mould plate carries out: at first open face upward under two moulding panel 12-2 and adopt interim limiting and fixing device to open after the forming panel framework with under the moulding panel 12-2 that faces upward be assembled into one, open again afterwards lie prone on two face moulding panel 12-1 and adopt interim limiting and fixing device to open after the forming panel framework and on the face moulding panel 12-1 that lies prone be assembled into one.
Said Hoisting System comprises that an end when promoting is fixed on a plurality of elevators on the said forming panel framework, is installed in a plurality of pulley brackets of the inboard upper and lower end parts of forming panel framework and is installed in a plurality of pulleys on the said pulley bracket through pulley spindle.Correspondingly; In the knockout course described in the step (c); After adopting jack and/or Chain block to open said forming mould plate; Earlier in the upper and lower end parts of said forming panel framework pulley is installed respectively, forming panel framework and forming mould plate after adopting interim limiting and fixing device to open again are assembled into one; Correspondingly; In the matched moulds process described in the step (e); After treating that said formwork-strengthening system 18-1 lifting puts in place, at first unclamp said interim limiting and fixing device, adopt jack and/or Chain block to open said forming mould plate again; Take out the pulley of being installed in the step (c) and then, unclamp said interim connector subsequently again; After adopting jack and/or Chain block to strain said forming mould plate afterwards and the position of said forming mould plate being transferred to design attitude; Screw said connection securing member and make whole forming panel framework closely contact with the forming mould plate is promptly accomplished the matched moulds process of said formwork-strengthening system 18-1.
The upper and lower end parts of said forming mould plate is provided with the fixed section template 16 that extend outwards section and said extend outwards section are formed said forming mould plate.Said four falseworks comprise that two are laid and identical falsework two 13-2 of structure to falsework one 13-1 and two direction across bridge of laying and structure is identical along bridges, the one or more girth members that hold out against of having jumped the queue of the junction between falsework one 13-1 and falsework two 13-2.
Particularly, in the present embodiment, be used in the forming panel of moulding king-post 5-2,5.74 meters of the length of forming mould plate one 11-1, and every sections to build highly be 3.6 meters, the length of fixed section template 16 is 2.14 meters; And it is inner that the both ends of falsework one 13-1 are inserted at the falsework two 13-2 both ends in four falseworks respectively; Weld a baffle plate at the infall of falsework one 13-1 and falsework two 13-2 and in the falsework two 13-2 outside during matched moulds; And symmetry is jumped a queue and is held out against girth member between said baffle plate and falsework one 13-1, and the said girth member that holds out against is specially the triangle wedges.In addition, falsework one 13-1 and falsework two 13-2 that are arranged on said forming panel upper and lower end parts all are set to the trussed construction be made up of upper chord, lower chord and web member.Said tie system is made up of a round steel and the nut that is installed in round steel one end; And the other end of round steel is welded on the whole stiff skeleton 8; Tie system is fixedly connected vertical layout two rows of the every side of forming panel and with falsework; Used nut treat institute's fluid concrete intensity reach 50% o'clock then dismountable, and can recycle.Used elevator is 10 tons of Chain blocks; 2 10 tons of Chain blocks are arranged in each both sides, angle, four angles of forming panel; And the upper end of 10 tons of Chain blocks is fixed on the whole stiff skeleton 8 with diameter 16mm twin cable; The lower end is fixed on the forming panel on the corresponding steel ear that is welded with diameter 16mm twin cable, and Chain block steel chain length in reserve+jack active length+rope capacity is greater than 3.6 meters of the hoisting depths of every sections.Slideway is divided into two parts: upper end slideway and bottom slideway; Wherein the upper end slideway specifically is arranged in next that be used for that moulding built the moulding sections and builds the face of lying prone on two of stiff skeleton of sections; And arrange 3 roads on the face of lying prone on 3.5 meters wide; The face of lying prone is arranged 4 roads on 5 meters; The upper end slideway specifically adopts 6mm steel plate underlay diameter 16mm reinforcing bar and stiff skeleton spot welding is fixed and leveling after can use, a pad reinforcing bar density need guarantee that the upper end slideway has enough rigidity not produce excessive deformation and influences template and climb; The concrete surface of moulding has been built in slideway direct utilization in bottom.Said pulley adopts 20 tons of self-aligning bearings, can prevent effectively that template from climbing process middle pulley decentraction and produce very big frictional force influence and climb.Pulley bracket adopts two blocks of thickness 20mm steel plates to punch at the fixed range place and places pulley spindle; Pulley bracket and the welding of template stiffening rib; [10 channel-section steels and stiffening rib reinforcement of weld on every side guarantee that pulley bracket has enough intensity, rigidity, and are indeformable and do not destroy to use 3 simultaneously.The demoulding step of king-post 5-2 is following in the moulding: the pretension bolt that the first step is unclamped place, four angles of forming panel is the pretension bolt between adjacent two falseworks head and the tail; And replace said pretension bolt with interim connector (being specially the long bolt bolt), guarantee that simultaneously each angle of forming panel is equipped with 8 long bolt bolts at least; Second step was removed the reinforcing triangle wedges of falsework one 13-1 and falsework two 13-2; The 3rd step was utilized jackscrew cooperation Chain block to open down and faces upward moulding panel 12-2 and open distance and is 50mm for the vertical distance apart from concrete surface; Install and fix 8 lifting tackles (being mainly guiding) afterwards, fixing with interim limiting and fixing device (being specially take-up device); The 4th step was opened the face moulding panel 12-1 that lies prone; And open distance for apart from the vertical distance of concrete surface being 25mm (the moulding panel 12-2 that will face upward down simultaneously is kept to 25mm apart from the vertical distance of concrete surface); Install and fix 28 lifting tackles afterwards, fix, accomplish the demoulding with take-up device.Correspondingly, the matched moulds step of king-post 5-2 is following in the moulding: after formwork-strengthening system promoted and to put in place, the first step was unclamped the take-up device of being installed on the face moulding panel 12-1 that lies prone, and utilized jackscrew to open to lie prone the about 30mm of face moulding panel 12-1 template; Second step was taken out pulley; The 3rd step utilized Chain block tension template to make fixed section template 16 contact and tighten pretension bolt with concrete surface, squeezed into the reinforcing triangle wedges of falsework one 13-1 and falsework two 13-2; The 3rd step unclamped the take-up device of being installed on the moulding panel 12-2 that faces upward down and took out associated pulleys; Utilize the moulding panel 12-2 that faces upward under the tension of jackscrew Chain block simultaneously; Make fixed section template 16 contact and tighten pretension bolt with concrete surface; Squeeze into the reinforcing triangle wedges of falsework one 13-1 and falsework two 13-2, accomplish matched moulds.
In the forming panel of moulding upper king-post strut 5-3; Be with the forming panel difference part of king-post 5-2 in the moulding: 4.74 meters of the forming mould plate length of moulding upper king-post strut 5-3; Every sections is built 2.7 meters of height; The length of fixed section template 16 is 2.363 meters, and the matched moulds of its shaping template, the demoulding and lifting process are all identical with the forming panel of king-post 5-2 in the moulding.In the said upper king-post strut 5-3 work progress, offer the rope groove synchronously at its sidepiece, because the rope groove is in each cast sections cross dimensions neither unanimity, thereby the rope slot template adopts bamboo glue pattern plate processing, in add the lumps of wood and reinforce, the every sections processing length of rope slot template is 3 meters.
The above; It only is preferred embodiment of the present invention; Be not that the present invention is done any restriction, every technical spirit changes any simple modification, change and the equivalent structure that above embodiment did according to the present invention, all still belongs in the protection domain of technical scheme of the present invention.
Claims (10)
1. main pylon of single-pylon cable-stayed bridge without dorsal integral hoisting template; It is characterized in that: comprise be used for segmentation build the formwork-strengthening system (18-1) of the required construction cable stayed bridge of moulding king-tower, along direction matches the demoulding matched moulds system (18-3) that uses and is separately positioned on formwork-strengthening system (18-1) top and walks with bottom and confession constructor with the whole Hoisting System (18-2) that upwards promotes of said formwork-strengthening system (18-1), with formwork-strengthening system (18-1) the plateform system (18-4) that extends upward of required construction cable stayed bridge king-tower, said Hoisting System (18-2) is installed on the said formwork-strengthening system (18-1); Said formwork-strengthening system (18-1) comprises the forming mould plate, be laid in the forming panel framework in the outside around the said forming mould plate and temporary fixed tie system is carried out in the position of said forming panel framework; Said forming panel framework is made up of a plurality of coupling assemblings that are assembled into one through the connection securing member; Said demoulding matched moulds system (18-3) comprises the interim connector that is installed on the forming panel framework, jack and/or the Chain block on the said forming mould plate is installed when being installed in interim limiting and fixing device and the demoulding or the matched moulds on the said forming mould plate.
2. according to the described main pylon of single-pylon cable-stayed bridge without dorsal integral hoisting template of claim 1; It is characterized in that: said forming mould plate is formed by surrounding the four formation of lots panels (10) all around that are tilted to the concreting chamber, and the said structure that is tilted to the concreting chamber is corresponding with the structure that needs moulding cable stayed bridge king-tower.
3. according to claim 1 or 2 described main pylon of single-pylon cable-stayed bridge without dorsal integral hoisting templates; It is characterized in that: said forming panel framework by pattern plate bolster be laid in around the said pattern plate bolster side and said pattern plate bolster carried out fastening multiple tracks level form to the quadrilateral structure framework; Said pattern plate bolster is surrounded by four sides template frame and said template frame comprise about two horizontal truss (17-1) and with about a plurality of template stiffening ribs (17-2) of connecting as one of two horizontal truss (17-1); Said level is connected to form by four falsework head and the tail to the quadrilateral structure framework successively, and said connection securing member is the pretension bolt that is connected between adjacent two falseworks head and the tail.
4. according to claim 1 or 2 described main pylon of single-pylon cable-stayed bridge without dorsal integral hoisting templates; It is characterized in that: said tie system comprises a plurality of said forming panel framework draw rod device of side all around that are laid in respectively, and the lower end of said draw rod device is installed on the said forming panel framework.
5. according to claim 1 or 2 described main pylon of single-pylon cable-stayed bridge without dorsal integral hoisting templates, it is characterized in that: the upper and lower end parts of said forming mould plate is provided with the fixed section template (16) that extend outwards section and said extend outwards section are formed said forming mould plate.
6. according to the described main pylon of single-pylon cable-stayed bridge without dorsal integral hoisting template of claim 3; It is characterized in that: said four falseworks comprise two along bridges to the falsework one (13-1) and two direction across bridge layings and the identical falsework two (13-2) of structure laid and structure is identical, the one or more girth members that hold out against of having jumped the queue of the junction between falsework one (13-1) and the falsework two (13-2).
7. according to claim 1 or 2 described main pylon of single-pylon cable-stayed bridge without dorsal integral hoisting templates, it is characterized in that: said formwork-strengthening system (18-1) is processed by steel material.
8. one kind is utilized main pylon of single-pylon cable-stayed bridge without dorsal integral hoisting template as claimed in claim 1 to carry out the method for main pylon of single-pylon cable-stayed bridge without dorsal integral hoisting construction; The cable stayed bridge king-tower of being constructed is divided into from the bottom to top that a plurality of sections are constructed and said cable stayed bridge king-tower set inside has and the corresponding whole stiff skeleton of its structure (8), it is characterized in that this method may further comprise the steps:
(a) bottom segment casting and constructing: at first formwork-strengthening system (18-1) is fixedly mounted on the outside around the bottom of whole stiff skeleton (8); After more said forming mould Board position being transferred to design attitude; Screw said connection securing member and make whole forming panel framework closely contact with the forming mould plate is promptly accomplished the matched moulds process of said formwork-strengthening system (18-1); Subsequently, utilize the bottom segment of the said cable stayed bridge king-tower of said formwork-strengthening system (18-1) pouring construction behind the matched moulds;
(b) install the end slideway: build in next that is used for that moulding built the moulding sections on the stiff skeleton lateral surface of sections and lay multiple tracks upper end slideway, and make upper surface and the moulding of said upper end slideway said next build the stiff skeleton lateral surface flush of sections;
(c) demoulding: all that laid on the said forming panel framework of at first outwarding winding connect securing member; And adopt interim connector to replace said connection securing member that said forming panel framework is assembled into one simultaneously, make the shape of forming panel framework remain unchanged and only its inner frame size become big from top to bottom in proportion; Adopt jack and/or Chain block to open said forming mould plate afterwards, forming panel framework and forming mould plate after adopting interim limiting and fixing device to open simultaneously are assembled into one, and promptly accomplish the knockout course of said formwork-strengthening system (18-1);
(d) promote: Hoisting System (18-2) is installed in the step (c) on the forming panel framework after the demoulding; And the direction that extends upward along required construction leaning tower upwards is promoted to said formwork-strengthening system (18-1) integral body and is used for moulding described in the step (b) next builds the stiff skeleton outside of sections; And when promoting, the concrete surface that the upper end of said formwork-strengthening system (18-1) utilizes the upper end slideway of being installed in the step (b) upwards to promote and the bottom of said formwork-strengthening system (18-1) utilizes its underpart to build completion promotes;
(e) matched moulds: after treating that said formwork-strengthening system (18-1) lifting puts in place; At first unclamp said interim limiting and fixing device and interim connector; After adopting jack and/or Chain block to strain said forming mould plate afterwards and the position of said forming mould plate being transferred to design attitude; Screw said connection securing member and make whole forming panel framework closely contact with the forming mould plate is promptly accomplished the matched moulds process of said formwork-strengthening system (18-1);
(f) concrete pouring construction: utilize next described in said formwork-strengthening system (18-1) the pouring construction step (b) behind step (e) matched moulds to build sections;
(e) repeating step (b)～(f) is accomplished all sections of said cable stayed bridge king-tower until pouring construction.
9. according to the described main pylon of single-pylon cable-stayed bridge without dorsal construction method for lifting whole of claim 8; It is characterized in that: the left part direction across bridge of institute's construction cable stayed bridge king-tower slope inwardly and said forming mould plate to surround the shape of cross section that is tilted to the concreting chamber be parallelogram, and the four formation of lots panels of forming said forming mould plate with the longitudinal center line of the said cable stayed bridge king-tower of need moulding be divided into that left side and two of upsides lie prone downwards on lie prone two on face moulding panel (12-1) and downside and right side to the following moulding panel (12-2) of facing upward of facing upward;
In the knockout course described in the step (d); Adopting jack and/or Chain block to open said two steps of forming mould plate time-division carries out: at first open face upward under two moulding panel (12-2) and adopt interim limiting and fixing device to open after the forming panel framework with under the moulding panel (12-2) of facing upward be assembled into one, open again afterwards lie prone on two face moulding panel (12-1) and adopt interim limiting and fixing device to open after the forming panel framework and on the face moulding panel (12-1) of lying prone be assembled into one.
10. according to claim 8 or 9 described main pylon of single-pylon cable-stayed bridge without dorsal construction method for lifting whole, it is characterized in that: the Hoisting System (18-2) described in the step (d) comprises that an end when promoting is fixed on a plurality of elevators on the said forming panel framework, is installed in a plurality of pulley brackets of the inboard upper and lower end parts of forming panel framework and is installed in a plurality of pulleys on the said pulley bracket through pulley spindle;
In the knockout course described in the step (c); After adopting jack and/or Chain block to open said forming mould plate; Earlier in the upper and lower end parts of said forming panel framework pulley is installed respectively, forming panel framework and forming mould plate after adopting interim limiting and fixing device to open again are assembled into one; Correspondingly; In the matched moulds process described in the step (e); After treating that said formwork-strengthening system lifting puts in place, at first unclamp said interim limiting and fixing device, adopt jack and/or Chain block to open said forming mould plate again; Take out the pulley of being installed in the step (c) and then, unclamp said interim connector subsequently again; After adopting jack and/or Chain block to strain said forming mould plate afterwards and the position of said forming mould plate being transferred to design attitude; Screw said connection securing member and make whole forming panel framework closely contact with the forming mould plate is promptly accomplished the matched moulds process of said formwork-strengthening system (18-1).
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| CN 201010013656 CN101781878B (en) | 2010-01-21 | 2010-01-21 | Integral lifting template of main pylon of single-pylon cable-stayed bridge without dorsal cables and lifting construction method thereof |
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| CN 201010013656 CN101781878B (en) | 2010-01-21 | 2010-01-21 | Integral lifting template of main pylon of single-pylon cable-stayed bridge without dorsal cables and lifting construction method thereof |
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| CN102995560B (en) * | 2011-09-09 | 2015-06-24 | 五冶集团上海有限公司 | Thin-wall hollow pier lifting frame and use method thereof |
| CN103669224B (en) * | 2013-12-26 | 2015-07-15 | 中铁上海工程局集团有限公司 | Method and steel pipe support for construction of arch tower of inclined arch tower double-cable-plane prestressed concrete cable-stayed bridge |
| CN105821753B (en) * | 2016-05-18 | 2018-01-23 | 中铁第四勘察设计院集团有限公司 | A kind of novel railway curve Cable-stayed Bridge with Slanted Pylon |
| CN107700355B (en) * | 2017-07-21 | 2019-05-07 | 南通振华重型装备制造有限公司 | A kind of bridge steel form bed die manufacture craft |
| CN108118620B (en) * | 2017-12-30 | 2023-07-18 | 中建三局集团有限公司 | Integral self-climbing integrated platform for bridge tower construction and construction method thereof |
| CN108547226B (en) * | 2018-05-25 | 2024-02-27 | 中交第二公路勘察设计研究院有限公司 | Tower column support for determining cable-free zone of inclined tower of cable-stayed bridge |
| CN110792028B (en) * | 2018-08-03 | 2021-06-04 | 中建路桥集团有限公司 | Construction method of cable-stayed bridge without back cables |
| CN108867396A (en) * | 2018-08-13 | 2018-11-23 | 中铁建大桥工程局集团第工程有限公司 | A kind of combination constructing method thereof of back-cable-free cable-stayed bridge tower |
| CN109972524B (en) * | 2019-04-18 | 2021-05-18 | 联建建设工程有限公司 | Construction method for closure section of inverted Y-shaped upper tower column |
| CN112663475A (en) * | 2020-12-25 | 2021-04-16 | 广西大学 | Truss cable-stayed bridge |
| CN114790695B (en) * | 2022-04-27 | 2023-04-28 | 中铁重工有限公司 | Manufacturing method of special-shaped independent tower matched hinged steel bridge pier system cable-stayed landscape steel bridge |
| CN115897399B (en) * | 2022-11-21 | 2024-05-31 | 中交建筑集团有限公司 | Construction method of lute-shaped cable-stayed bridge inclined main tower |
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